Roslyn:工作区在控制台应用程序中加载,但在msbuild任务中没有

Question

我有一个使用此命令的自定义msbuild任务:

var workspace = Workspace.LoadStandAloneProject(csprojPath);

当我运行它时,它会抛出以下错误:

  System.InvalidCastException was unhandled by user code
  Message=Unable to cast transparent proxy to type 'Roslyn.Utilities.SerializableDataStorage'.
  Source=Roslyn.Services
  StackTrace:
       at Roslyn.Utilities.RemoteServices.CreateInstance[T]()
       at Roslyn.Services.Host.TemporaryStorageServiceFactory.CreateService(IWorkspaceServiceProvider workspaceServices)
       at Roslyn.Services.Host.WorkspaceServiceProviderFactory.Provider.c__DisplayClass7.b__4()
       at Roslyn.Utilities.NonReentrantLazy`1.get_Value()
       at Roslyn.Services.Host.WorkspaceServiceProviderFactory.Provider.GetService[TWorkspaceService]()
       at Roslyn.Services.SolutionServices..ctor(IWorkspaceServiceProvider workspaceServices, ILanguageServiceProviderFactory languageServicesFactory)
       at Roslyn.Services.Solution..ctor(SolutionId id, String filePath, VersionStamp version, VersionStamp latestProjectVersion, ILanguageServiceProviderFactory languageServiceProviderFactory, IWorkspaceServiceProvider workspaceServices)
       at Roslyn.Services.Host.SolutionFactoryServiceFactory.SolutionFactoryService.CreateSolution(SolutionId id)
       at Roslyn.Services.Host.TrackingWorkspace.CreateNewSolution(ISolutionFactoryService solutionFactory, SolutionId id)
       at Roslyn.Services.Host.TrackingWorkspace..ctor(IWorkspaceServiceProvider workspaceServiceProvider, Boolean enableBackgroundCompilation, Boolean enableInProgressSolutions)
       at Roslyn.Services.Host.HostWorkspace..ctor(IWorkspaceServiceProvider workspaceServiceProvider, Boolean enableBackgroundCompilation, Boolean enableInProgressSolutions, Boolean enableFileTracking)
       at Roslyn.Services.Host.LoadedWorkspace..ctor(ILanguageServiceProviderFactory languageServiceProviderFactory, IWorkspaceServiceProvider workspaceServiceProvider, IProjectFileService projectFileFactsService, IDictionary`2 globalProperties, Boolean enableBackgroundCompilation, Boolean enableFileTracking)
       at Roslyn.Services.Host.LoadedWorkspace..ctor(ExportProvider exportProvider, Boolean solutionLoadOnly, Boolean enableFileTracking)
       at Roslyn.Services.Host.LoadedWorkspace..ctor(Boolean enableFileTracking)
       at Roslyn.Services.Host.LoadedWorkspace.LoadStandAloneProject(String projectFileName, String configuration, String platform, String language, Boolean enableFileTracking)
       at Roslyn.Services.Workspace.LoadStandAloneProject(String projectFileName, String configuration, String platform, String language, Boolean enableFileTracking)
       ...

使用相同项目在控制台应用程序中运行时,相同的代码运行正常.

有任何想法吗？谷歌搜索没有帮助!

Answer 1

这是 MSBuild 的限制。Roslyn 无法在构建期间递归调用 MSBuild 来确定项目属性/文件/引用。为了IProject在构建任务期间创建 Roslyn，请尝试使用LoadFromCommandLineArgs()方法。您需要构建任务以采用与 CscTask 最终传递给编译器相同的参数。

希望这可以帮助！